Building unit for a space structure



FIG. 1 is a top perspective view of a building unit for a space structure showing my new design;

FIG. 2 is a top plan view thereof; and

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a left side elevational view thereof, taken along the line 4--4 of FIG. 3, the right side elevational view being a mirror image of that shown. 

The ornamental design for a building unit for a space structure, as shown and described. 